Does this mechanic bill look dishonest?

This is not my car. The car is a 1999 honda accord lx with 81,500 miles in good overall shape/strong engine. The shop replaced the ignition switch stating poor contacts inside the switch (the car never had any ignition problems) and the guy said told my mom the car could switch into neutral while driving if the switch was bump a certain way. The shop also replaced the oxygen sensor (the old one was previously checked and no codes were found, there was also continuity in the wiring and the engine light was not on. The shop added 3 quarts of new oil (there had been no signs of blue smoke or any oil loss plus it's a good running car and had an oil change 4250 miles ago with 4 quarts of oil added.

The cars problem when is went into the shop was it ran jogging speed without any gas and it made an odd sound which did not sound engine related. The only light on was the matenance light (the engine light was not on) . After the "repair" the noise is gone but the other problems still existed and the matenance light is still on.

heres the bill (roughly)

hourly rate - $100.00
replaced parts -
o2 sensor - $180.00 (I'm assuming it's oem/honda)
ignition switch - $90.00
3 quarts oil added 5w-30 - $10.00
total - $280.00

labor
upstream o2 sensor replacement $54.00
ignition switch replacement - $100.00
oil refill?
rack and piñon replacement? - $100.00
total repair cost - $459.00?

They were dishonest, Unfortunately shops will take advantage of people that don't know cars, I take my car in for oil changes but know my car inside and out, So far 99% of them have told me I need about $500.00 worth of things doing, that was over 15,000 miles ago and the car still runs great. Maybe she can check with the Better Business Bureau and see if the shop had any negative reviews. I'm not sure about Angie's list but heard they have a good reputation for recommending good businesses in different areas.

You have been totally ripped off. I would go to the shop and tell them you are on your way to the small claims court and BBB if they don't fix this bill. By fix I mean you pay nothing since your original problem was not fixed. AND---I assume mom paid with credit card. ---Dispute the charge immediately with your credit card company.

Padded by at least $100.00. Rack and pinion replacement? That is steering component R&R, no parts listed. 3 hr. Job, and if they charge $180.00 for an o2 sensor, rack assy. Would run $600.00. 3 qts. Oil sounds like BS, too. Find Moms another shop, As soon as possible.

This bill is as PHONY as they come. First of all nobody can even BUY a re-manufactured rack and pinion part for $100.00. Go to rockauto.com, partstrain.com or autopartswarehouse.com. And price them!

You can't buy an original equipment Denso down-stream or up-stream oxygen sensor for $54.00